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Regulatory role of nitric oxide over extracellular taurine in the hippocampus of freely moving rats.

We have studied the effects of drugs which manipulate nitric oxide (NO) levels as well the effect of N-methyl-d-aspartate (NMDA) infusion on extracellular taurine in rat hippocampus using in vivo microdialysis. The NO donor S-nitroso-N-acetylpenicillamine (SNAP) increased dialysate taurine in a concentration-dependent manner, and this effect was blocked by the inhibitor of soluble guanylate cyclase1H-[1,2,4]oxadiazolo[4,3-alpha]quinoxalin-1-one (ODQ). NMDA (100 microM) increased hippocampal taurine release, an effect that was reversed by the NMDA receptor antagonist 2-amino-5-phosphonopentanoi

Fine specificity and subclasses of IgG anti-actin autoantibodies differ in health and disease.

Current opinions suggest that autoantibodies occurring in autoimmune diseases are generated by B-cells which primarily produce polyspecific natural autoantibodies, through either polyclonal activation or specific antigen selection of these B-cells. In this study, we compared the immunological properties (polyspecificity, fine specificity and IgG subclasses) between natural anti-actin antibodies (N-AAA) and disease-associated AAA (D-AAA). IgG AAA from sera of healthy donors, patients with autoimmune hepatitis type 1 (AIH-1) and patients with primary biliary cirrhosis (PBC) were affinity-purifie

A prospective, randomized clinical trial of universal WBC reduction.

BACKGROUND: Recipient exposure to allogeneic donor WBCs results in transfusion complications for selected populations of recipients. Whether or not WBC reduction should be universally applied is highly controversial. STUDY DESIGN AND METHODS: In a general hospital, a randomized, controlled clinical trial of conversion to universal WBC reduction was conducted. Patients (11%) with established medical indications for WBC-reduced blood were not eligible. All other patients who required transfusion were assigned at random to receive either unmodified blood components or stored WBC-reduced RBCs and

Differential cardiovascular responses to blockade of nNOS or iNOS in rostral ventrolateral medulla of the rat.

We investigated the contribution of neuronal or inducible nitric oxide synthase (nNOS or iNOS) at the rostral ventrolateral medulla (RVLM) to central cardiovascular regulation by endogenous nitric oxide (NO), using Sprague-Dawley rats anaesthetized and maintained with propofol. Microinjection bilaterally into the RVLM of a NO trapping agent, carboxy-2-phenyl-4,4,5,5-tetramethylimidazoline-l-oxy-l-3-oxide (10, 50 or 100 nmoles) resulted in significant hypotension and bradycardia. Similar application of a selective antagonist of nNOS, 7-nitroindazole (1, 2.5 or 5 pmoles), or selective antagonist

Conservation of an intact human immunodeficiency virus type 1 vif gene in vitro and in vivo.

Replication of vif-negative human immunodeficiency virus type 1 (HIV-1) is attenuated in certain cell lines and highly impaired in peripheral blood lymphocytes in vitro. To determine whether intact vif is positively selected during natural HIV-1 infection and to determine vif sequence variability, we employed PCR amplification, cloning, and sequencing to investigate the vif region of replicating virus in short-term-passage HIV-1 primary isolates from five asymptomatic individuals and from five persons with AIDS. A total of 46 vif clones were obtained and analyzed. Recombinant proviruses were c

The use of mutants of Escherichia coli for the identification of human lymphocyte subpopulations in blood smears.

In previous work we have shown that some bacteria can bind to human lymphocytes and can be used to identify lymphocyte subpopulations in conventionally stained blood smears. These bacteria are of different species or genera, which makes it difficult to study the binding mechanism. Also, the main marker for B cells, Brucella melitensis, is of very small size and highly pathogenic. Here we show that B cells as well as some of the T cell subpopulations can be identified by different mutants obtained from a strain of an Escherichia coli. Two procedures were used to generate mutants. First, E. coli

Prospective evaluation of medication-related problems and pharmacist interventions in liver transplant recipients.

BACKGROUND: Medication-related problems (MRPs) are a common patient safety issue among hospitalized individuals, often associated with reduced quality of life, increased healthcare costs, and higher mortality. Due to the chronic and complex nature of post-transplant care, liver transplant recipients are particularly vulnerable to MRPs. Clinical pharmacists play a critical role in identifying and resolving MRPs, thereby promoting the rational use of medications. The objective of this study was to characterize MRPs among liver transplant recipients and assess the clinical determinants associated

Novel approaches for separating graft-versus-leukemia effects from graft-versus-host disease.

Allogeneic hematopoietic cell transplantation (allo-HCT) is a curative therapy for various hematologic malignancies. Separation of graft-versus-leukemia (GVL) effects from graft-versus-host disease (GVHD) remains one of the central challenges in allo-HCT. However, relapse after allo-HCT remains associated with poor prognosis, and effective strategies that preserve graft-versus-leukemia (GVL) effects while preventing graft-versus-host disease (GVHD) are still lacking. Recent advances have revealed that post-transplant relapse is driven by diverse mechanisms, including leukemia-intrinsic immune

Breaking the Methanol Synthesis Barrier in CO2 Photoreduction: The Synergistic Effect of Single Atom Copper Within Covalent Organic Frameworks.

The main challenges in the selective reduction of CO2 to methanol (MeOH) via photocatalysis with covalent organic frameworks (COFs) as catalysts are slow charge transfer kinetics and limited CO2 adsorption and activation. Herein, COF-TPDA is designed to securely anchor isolated Cu single atoms at its imine N sites, resulting in the formation of the Cu1/COF-TPDA single atom catalyst. Cu1/COF-TPDA demonstrates robust photocatalytic activity, achieving a MeOH yield of 872.5 μmol·gcat-1·h-1 for the selective conversion of CO2 in neutral water under simulated sunlight, without the use of sacrificia

Utilization of Autologous Skin Shave Micrografting for Treatment of Advanced Stage Pressure Injuries: A Seven-Patient Case Series.

OBJECTIVE: The authors present an autologous skin shave micrografting (ASSM) technique for treating stage 3 to 4 pressure injuries (PI). METHODS: Between 2024 and 2025, 7 patients with stage 3 and 4 PIs were treated using skin micrografting. RESULTS: Seven patients with 10 PIs (3 stage 3 and 7 stage 4) underwent ASSM. The average PI size was 7.2 cm2. The average depth was 0.3 cm. The average donor site measured 1.5 cm2. All patients demonstrated complete healing within 4 months. Five of 7 patients remained recurrence-free during a 9-month follow-up period, and only 1 out of 10 PIs was open a

Selective Stabilization of PSI-Associated Electron Transport Network Underlies Cytokinin-Mediated Delay of Leaf Senescence in Barley.

Leaf senescence progressively remodels the photosynthetic apparatus, leading to impaired electron transport and declining carbon assimilation. Here, we investigated how dark-induced senescence (DIS) and exogenous 6-benzyladenine (BA) affect photosystem function, cyclic electron flow (CEF), photosynthetic protein remodeling and CO2 assimilation in two barley (Hordeum vulgare L.) cultivars differing in their senescence characteristics, Carina (spring) and Lomerit (winter). DIS markedly reduced the chlorophyll content, PSI and PSII photochemistry, electron transport and CO2 assimilation in both c

Reducing Solvent Selectivity via Solid Additive-Assisted Strategy Enables Organic Solar Cells With Approaching 21% Efficiency.

Currently, high-performance organic solar cells (OSCs) are predominantly fabricated using chloroform (CF) to achieve an optimal active-layer morphology. However, its rapid film formation results in a narrow processing window and severely limits industrial scalability. Therefore, reducing solvent selectivity during active-layer processing is essential to facilitate scalable OSC manufacturing. Herein, this critical issue is finely addressed by a solid-additive-assisted strategy, in which 2,6-dimethylnaphthalene (2,6-DMN) is incorporated to modulate the film formation dynamic and molecular aggreg

A Comparative Study of Generative Artificial Intelligence Tools for Human Bone Learning.

The aim of this study was to evaluate the effectiveness of three different generative AI tools, ChatGPT-4o, Claude 3.7 Sonnet, and Gemini 2.0 Flash, with a specific focus on their accuracy and response consistency in supporting self-directed learning in human skeletal anatomy. A total of 143 human skeletal specimens were selected for evaluation. Bone specimens from different donors were photographed to represent each structure, resulting in a total of 715 images. Four types of questions were generated to assess each AI model's ability to identify anatomical features. Responses were categorized

Twenty-Year Follow-up After Combined Heart and Kidney Transplant: A Case Report.

Combined heart and kidney transplant is a rare but valuable treatment option for selected patients with end -stage cardiac and renal failure. We present the long -term outcome of a 27 -year -old man with pulmonary stenosis previously treated with valvuloplasty in 1998, who subsequently developed end-stage renal disease secondary to glomerulonephritis and progressive dilated cardiomyopathy with intolerance to hemodialysis. In 2006, he received a combined heart and kidney transplant using organs from a 52 -year -old deceased male donor. Cold ischemia time was 6.5 hours, HLA matching was 3 /6, in

Cytocompatible FRET Assembly of CdTe@GSH Quantum Dots and Au@BSA Nanoclusters: A Novel Ratiometric Strategy for Dopamine Detection.

This study presents a novel ratiometric fluorescent sensor based on Förster resonance energy transfer (FRET) between glutathione (GSH)-coated CdTe quantum dots (CdTe/GSH QDs) and bovine serum albumin (BSA)-coated Au nanoclusters (AuNCs/BSA) for dopamine (DA) detection. The nanoparticles were characterized using transmission electron microscopy (TEM), zeta potential measurements, Fourier transform infrared (FTIR) spectroscopy, UV-Vis absorption and fluorescence spectroscopy. Key FRET parameters, including energy transfer efficiency (E), donor-acceptor distance (r), Förster distance (R0), and th

Uncovering NK cell sabotage in gut diseases via single cell transcriptomics.

The identification of immune environments and cellular interactions in the colon microenvironment is essential for understanding the mechanisms of chronic inflammatory disease. Despite occurring in the same organ, there is a significant gap in understanding the pathophysiology of ulcerative colitis (UC) and colorectal cancer (CRC). Our study aims to address the distinct immunopathological response of UC and CRC. Using single-cell RNA sequencing datasets, we analyzed the profiles of immune cells in colorectal tissues obtained from healthy donors, UC patients, and CRC patients. The colon tissues

Perinatal outcomes of fetoscopic selective laser photocoagulation for spontaneous twin-anemia polycythemia sequence.

OBJECTIVES: Antenatal management of monochorionic pregnancies complicated by twin anemia polycythemia sequence (TAPS) remains sub-optimally defined. Our objective was to evaluate the safety and efficacy of fetoscopic selective laser photocoagulation with respect to fetal and neonatal survival. METHODS: A case series is reported with patients referred to the Texas Children's Fetal Center for evaluation and management of suspected spontaneous TAPS without concomitant twin-to-twin syndrome from 2014 to 2023. All evaluations were performed by our team and patients with stage II-IV TAPS were offer

Selecting DCD Recipients Using Predictive Indices.

UNLABELLED: Donation after circulatory death (DCD) allografts might represent one of the largest untapped sources of liver allografts. Our aim was to identify independent recipient risk factors that predict mortality in DCD allograft recipients to preselect optimal candidates for successful transplantation. Furthermore, we compared the application of our newly constructed DCD Recipient Selector Index (RSI) score to previously developed models to determine superiority in predicting recipient survival. METHODS: Using the Organ Procurement and Transplantation Network database, we performed univa

Potential Carcinogens in Makeup Cosmetics.

Facial makeup cosmetics are commonly used products that are applied to the skin, and their ingredients come into contact with it for many years. Consequently, they should only contain substances that are considered safe or used within an allowable range of established concentrations. According to current European laws, all cosmetics approved for use should be entirely safe for their users, and the responsibility for this lies with manufacturers, distributors, and importers. However, the use of cosmetics can be associated with undesirable effects due to the presence of certain chemical substanc

Predicting Long-term Survival After Allogeneic Hematopoietic Cell Transplantation in Patients With Hematologic Malignancies: Machine Learning-Based Model Development and Validation.

BackgroundScoring systems developed for predicting survival after allogeneic hematopoietic cell transplantation (HCT) show suboptimal prediction power, and various factors affect posttransplantation outcomes.ObjectiveA prediction model using a machine learning-based algorithm can be an alternative for concurrently applying multiple variables and can reduce potential biases. In this regard, the aim of this study is to establish and validate a machine learning-based predictive model for survival after allogeneic HCT in patients with hematologic malignancies.MethodsData from 1470 patients with he

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… Application of the Algorithm for Donor Selection We assumed that the prediction score for each patient can be applied in selecting the most appropriate donor when there are multiple donor candidates. …